This morning I am having trouble upgrading Firmware from cnMaestro on a couple different devices (both cnPilot R200). At first I wasn't getting a specific error but I've attached a screenshot of what it says now.
I would upgrade the firmware manually but 4.2-R1 for cnPilot R200/R201 is currently only available through cnMaestro.
Have you checked Cambium's downloads on their support site? Looks like it should be there for you to download. Not sure why Maestro is giving that error, Cambium may be able to speak to that more.
There was some issue in 4.2-R1 and we have removed it, we have uploaded new build 4.2-R3 in cnMaestro (release note and support site will be updated soon)
Can you please try updating your cnPilot from cnMaestro now.
Great to hear that your problem is solved. Well to answer your other query about some of the devices running 4.1-R2, we will always encourage all our customers to be on the latest and recommended version.
cnPilot 4.2-R3 is latest and stable compared to 4.1-R2.